/Engine/Plugins/Runtime/SoundCueTemplates/Source/SoundCueTemplates/Public/SoundCueTemplate.h
Utility function that adds a provided child node to a parent node's list of children. InParentNode - Node to set as parent of provided child. InChildNode - Node to set as child of provided parent. InputPinIndex -Indexof input pin to connect newly constructed ChildNode to. InputPinDisplayName - (Optional) Name to set the targeted input pin to.
static void AddSoundNodeChild ( [USoundNode](API\Runtime\Engine\Sound\USoundNode) & InParentNode, [USoundNode](API\Runtime\Engine\Sound\USoundNode) & InChildNode, int32 InputPinIndex, const [FText](API\Runtime\Core\Internationalization\FText) * InputPinDisplayName )